Which of the following situations cannot be modeled with the equation 2x + y = 0? . . . . a. . it takes 2 parts of chemical a to neutralize 1 part of chemical b. . . b. . tony must pull. twice as hard as ralph just to sit still in a match of tug-o-war. . . c. . if sophie earns twice as many points as penalties, she will break even. . . d. . tom’s saturday shift was twice as long as his 2 hour sunday shift. @darkblooyoshi